The biggest stamp block is 5.5" x 2.75", the thin one is 5.5" x 1.25". Put together with a small gap in between, they are 5.5" x 4.25" and perfect for a card front.
The sizes of the stamps vary between 1.75" x 0.5" and 2.5" x 1" for the rectangles and the squares are 1.75" x 1.75" and 1.75" x 1.5".
Please take a look at the last picture for all the stamp block options in my shop.
If you would like to buy multiple items, message me before purchase. I consolidate shipping costs.